New! Search for patents from more than 100 countries including Australia, Brazil, Sweden and more

US20100259919A1 - LED Downlight Retaining Ring - Google Patents

LED Downlight Retaining Ring Download PDF

Info

Publication number
US20100259919A1
US20100259919A1 US12/703,334 US70333410A US2010259919A1 US 20100259919 A1 US20100259919 A1 US 20100259919A1 US 70333410 A US70333410 A US 70333410A US 2010259919 A1 US2010259919 A1 US 2010259919A1
Authority
US
United States
Prior art keywords
led
downlight
retaining ring
circuit board
printed circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US12/703,334
Other versions
US8602601B2 (en
Inventor
Mohamed Aslam Khazi
Kenneth Czech
Peter Franck
Alejandro Mier-Langner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Lighting Holding BV
Original Assignee
Koninklijke Philips NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US15177409P priority Critical
Application filed by Koninklijke Philips NV filed Critical Koninklijke Philips NV
Priority to US12/703,334 priority patent/US8602601B2/en
Assigned to KONINKLIJKE PHILIPS ELECTRONICS N.V. reassignment KONINKLIJKE PHILIPS ELECTRONICS N.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FRANCK, PETER, CZECH, KENNETH, KHAZI, MOHAMED ASLAM, MIER-LANGNER, ALEJANDRO
Publication of US20100259919A1 publication Critical patent/US20100259919A1/en
Publication of US8602601B2 publication Critical patent/US8602601B2/en
Application granted granted Critical
Assigned to PHILIPS LIGHTING HOLDING B.V. reassignment PHILIPS LIGHTING HOLDING B.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KONINKLIJKE PHILIPS N.V.
Application status is Active legal-status Critical
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/62Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using mixing chambers, e.g. housings with reflective walls
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00Lighting devices intended for fixed installation
    • F21S8/02Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/026Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/12Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/16Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00Fastening of light sources or lamp holders
    • F21V19/001Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F21V19/0035Fastening of light source holders, e.g. of circuit boards or substrates holding light sources the fastening means being capable of simultaneously attaching of an other part, e.g. a housing portion or an optical component
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/502Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/505Cooling arrangements characterised by the adaptation for cooling of specific components of reflectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/75Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/77Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
    • F21V29/773Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

An LED downlight comprises a primary reflector having an upper end and an open lower end, an LED printed circuit board assembly disposed in the upper end of the reflector, an optical assembly positioned beneath the LED printed circuit board assembly, a secondary reflective ring positioned beneath the LED printed circuit board assembly and within the primary reflector housing, the secondary reflector ring supporting the optical assembly and improving light distribution.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • The present non-provisional application claims priority to U.S. Provisional Application Ser. No. 61/151,774, filed Feb. 11, 2009.
  • TECHNICAL FIELD
  • The present invention first embodiment pertains to a downlight luminaire. More specifically, the first embodiment pertains to a downlight luminaire having a first heat dissipation subassembly and a reflector which is in direct thermal communication with a LED printed circuit board assembly so as to dissipate heat through two structures and provide higher efficiency of operation.
  • Additionally, a second embodiment pertains to a downlight luminaire. More specifically, the second embodiment pertains to a downlight luminaire having a retaining ring positioned within the luminaire reflector for supporting an optical assembly and reflecting light to a center area beneath the downlight in order to provide higher illumination directly beneath the luminaire.
  • BACKGROUND
  • Recessed downlight luminaires are extremely popular due to their unobstructive, hidden nature within a ceiling and the versatility provided by the various types of downlights available. Downlights may be used to provide wall wash, normal downlight or highlight a specific area.
  • As the popularity of these luminaires has grown, improvements have been continually made to improve the operating efficiency and lighting characteristics. For example, downlights have been developed to operate with compact fluorescent lamps (CFLs). Even more efficient than CFLs, it would be desirable to develop downlights to operate specifically with light emitting diodes (LEDs). However, when LEDs are positioned in deep round reflectors, there is a propensity to have a dark area in the center of a light dispersion graph. As shown in FIG. 1, the center area beneath the downlight indicates a sharp decrease in illumination at the center of the light distribution pattern. It would be desirable to redirect some light toward the center of the light distribution pattern to provide more uniform illumination on a work plane.
  • Another area of desired improvement is with operating efficiency. In general, LEDs have the potential to provide a higher efficiency and longer life than other light sources. LEDs have a higher operating efficiency in part due to cooler operating temperatures. Moreover, LEDs do not burn out like incandescent bulbs, but instead dim over the course of their life. When LEDs operate at cooler temperatures, they operate more efficiently, meaning higher light output for given input energy. Additionally, with more efficient operation at cooler temperatures, the LEDs have longer life. As temperatures increase however, the efficiency decreases and the life is reduced.
  • Downlights are typically positioned in a plenum or similar volume above a ceiling. Since this plenum area is typically enclosed, the heat from the downlight has a tendency to build up and over a period of time and the temperature is higher than the temperature below, in the illuminated area. Since the illuminated area below the light is cooler than the volume above, it would be desirable, from an operating efficiency perspective, to transfer some heat to this area beneath the luminaire in order improve LED performance and life.
  • Given the foregoing deficiencies, it would be desirable to overcome the above and other deficiencies.
  • SUMMARY
  • An LED downlight comprises a primary reflector having an upper end and an open lower end, an LED printed circuit board assembly disposed in the upper end of the reflector, an optical assembly positioned beneath the LED printed circuit board assembly, a secondary reflective ring positioned beneath the LED printed circuit board assembly and within the primary reflector housing, the secondary reflector ring supporting the optical assembly and improving light distribution. The LED downlight wherein the secondary reflector ring has an inner beveled surface. The LED downlight wherein the inner beveled surface directs light downwardly centrally beneath the downlight. The LED downlight wherein the inner beveled surface is disposed at angle of between about 35 and 65 degrees. The LED downlight wherein the LED downlight having a plurality of blue LEDs. The LED downlight wherein the optical assembly has a phosphor system on an inner surface closest to the LED printed circuit board assembly.
  • An LED downlight comprises an LED array disposed on a printed circuit board, a mixing chamber disposed within a primary reflector, the LED array positioned near an upper end of the primary reflector, a retaining ring having a reflective inner surface positioned with the primary reflector, an optical assembly disposed within the retaining ring, the mixing chamber capturing the optical assembly within the retaining ring, the retaining ring inner surface being beveled and distributing a light pattern downward and centrally beneath the downlight. The LED downlight wherein the beveled inner surface disposed at an angle of between about 35 and 65 degrees. The LED downlight wherein the beveled inner surface has a length of about 0.1 inches. The LED downlight wherein the beveled inner surface extends from the lens to the primary reflector. The LED downlight wherein the retaining ring having a lip for seating the lens. The LED downlight wherein the LED array has a plurality of white LEDs. The LED downlight wherein the LED array is connected to a metal core printed circuit board. The LED downlight wherein the retaining ring is formed of aluminum. The LED downlight wherein the retaining ring inner beveled surface is one of specular, diffuse or semi-diffuse.
  • An LED downlight comprises a primary reflector having an upper end and a lower open end, a LED printed circuit board assembly disposed near the upper end of the primary reflector, a mixing subassembly depending downwardly toward a lens, the mixing subassembly receiving light from the LED printed circuit board assembly, the lens beneath the LED printed circuit board assembly, a retaining ring receiving the lens, the retaining ring disposed within the primary reflector, the retaining ring further comprising an angled inner surface. The LED downlight further comprising a plurality of LED apertures disposed in an upper surface of the mixing subassembly. The LED downlight further comprising the mixing subassembly having a reflective inner surface. The LED downlight wherein the mixing assembly is substantially frusto-conical in shape. The LED downlight further comprising a mixing chamber being seated in the retaining ring. The LED downlight wherein the mixing chamber is fastened to the heat sink.
  • BRIEF DESCRIPTION OF THE ILLUSTRATIONS
  • A better understanding of the embodiments of the invention will be had upon reference to the following description in conjunction with the accompanying drawings in which like numerals refer to like parts throughout the several views and wherein:
  • FIG. 1 is a light distribution graph of a prior art downlight indicating lower output beneath the downlight;
  • FIG. 2 is a perspective view of an exemplary LED downlight;
  • FIG. 3 is a side elevation view of the LED downlight of FIG. 2;
  • FIG. 4 is a top view of the LED downlight of FIG. 2;
  • FIG. 5 is an exploded perspective view of the LED downlight of FIG. 2;
  • FIG. 6 is a side-sectional view of the LED downlight of FIG. 2, including ray-traces depicting the effect of the reflective surface of the retaining ring;
  • FIG. 7 is a sectioned perspective view of the LED downlight of FIG. 2;
  • FIG. 8 is a perspective view of the reflective retaining ring;
  • FIG. 9 is a sectional view of retaining ring as indicated in FIG. 8; and,
  • FIG. 10 is a light distribution graph of the LED downlight of FIG. 2.
  • DETAILED DESCRIPTION
  • It is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless limited otherwise, the terms “connected,” “coupled,” and “mounted,” and variations thereof herein are used broadly and encompass direct and indirect connections, couplings, and mountings. In addition, the terms “connected” and “coupled” and variations thereof are not restricted to physical or mechanical connections or couplings.
  • Furthermore, and as described in subsequent paragraphs, the specific mechanical configurations illustrated in the drawings are intended to exemplify embodiments of the invention and that other alternative mechanical configurations are possible.
  • Referring now in detail to the drawings, wherein like numerals indicate like elements throughout the several views, there are shown in FIGS. 2-10 various embodiments of a light emitting diode (LED) downlight. The LED downlight includes a heat sink at the upper end of the fixture and a thermally conductive reflector beneath the heat sink to provide two modes of heat dissipation. The LED printed circuit board assembly is in direct engagement with at least one of the light reflector and the heat sink in order to transfer heat. The LED downlight also comprises a reflective retaining ring to improve lighting directly beneath the LED downlight as indicated in a light dispersion graph. The retaining ring also provides a seat for an optical assembly in the downlight.
  • Referring initially to FIG. 2, a perspective view of the LED downlight 10 is shown. The light emitting diode (LED) downlight 10 comprises a heat dissipation subassembly 12 and a primary reflector 14. The primary reflector 14 includes curved sidewalls and an upper end where the heat sink 20 is positioned, although alternative shapes may be utilized and such descriptions should not be considered limiting. At a lower edge of the primary reflector 14 is a trim ring or flange 16. In order to position the recessed downlight the LED downlight 10, a ceiling aperture is formed within the ceiling material, such as drywall, plaster, or ceiling panel. The ceiling aperture may not exactly match the dimensions of the lowermost edge of the primary reflector 14. Accordingly, the flange 16 extends radially outward and covers the hole in the ceiling to provide a clean, aesthetically pleasing look for the downlight, which will be understood by one skilled in the art. This configuration also places the thermally conductive reflector 14 in thermal communication with the cooler air space below the luminaire 10.
  • The LED downlight 10 utilizes an upper heat sink structure to dissipate heat as part of the heat dissipation subassembly 12. The device further utilizes the primary reflector 14 as a second heat dissipation means in order to further dissipate heat from the device which increases the efficiently and life of the LEDs utilized within the downlight 10. In the exemplary embodiment, the heat sink 20 and the reflector 14 do not touch one another. This creates the two modes of heat dissipation and inhibits transfer of heat from the heat sink 20 through the reflector 14.
  • Referring now to FIG. 3, the LED downlight 10 is depicted in a side elevation view. The heat sink subassembly 12 comprises a heat sink or first dissipation means 20 positioned near the upper end of the primary reflector 14. As an alternative, the heat sink 20 could be positioned spaced some distance from the reflector 14. The heat sink 20 generally comprises a cylindrical body 20 surrounding or generally disposed around the upper portion of the primary reflector 14. However, the cylindrical shape should not be considered limiting as various alternative shapes may be utilized, such as pentagonal, octagonal, square or other such geometries. The body 22 receives heat generated by the LEDs within the downlight 10 and transfers the heat through the body 22 to a plurality of fins 24 which dissipate heat to a plenum wherein the downlight 10 is positioned. The heat sink or first heat dissipation means 20 is formed of aluminum material. However, alternative materials with good thermal transfer properties may be utilized within the scope of the present invention, in order to dissipate the heat. For example, cast copper, zinc or injection molded materials having good thermal conductivities may be utilized.
  • The primary reflector 14 is formed of a spun aluminum material and may be finished in various manners including an anodized diffuse or specular finish, a clear finish, a painted finish or another reflective metalized finish, for example. Since the primary reflector 14 is also used as a secondary heat dissipation means, the reflector 14 is preferably also made up a material having a good thermal conductivity characteristics.
  • Referring to FIG. 4, a top view of the downlight fixture 10 is depicted. Since the flange 16 and portions of the primary reflector 14 are in thermal communication with the space beneath the ceiling, the primary reflector 14 functions as a secondary heat dissipation means also removing heat from the LEDs by utilizing the relatively cooler air space below. Efficiency studies indicate increased performance of about 8 to about 20 percent. The space beneath the downlight 10 is typically a cooler temperature than the plenum area where the heat sink 20 is positioned. Since the flange 16 and primary reflector 14 are in fluid communication with this cooler area, the reflector 14 removes additional heat from the LED printed circuit board assembly 30 (FIG. 5) to operate more efficiently, ultimately saving money and increasing the life and efficiency of the downlight 10 LEDs.
  • Referring still to FIG. 4, the heat sink 20 is clearly shown above the primary reflector 14. The plurality of fins 24 extend from the central area body 22 of the heat sink 20 generally radially outward. The fins 24 may have a slight curvature when viewed from above. The curvature increases surface area of the fins 24. Additionally, the curvature has been optimally designed to increase air flow over the fins caused by the convective heat currents. A subassembly nut 18 is also visible from the top view. The subassembly 12 is connected by four screws to the reflector shoulder 15. This configuration sandwiches the LED printed circuit board assembly 30 (FIG. 5) between the heat sink 20 and the reflector 14. This in turn provides proper contact between the board 30, interface 28 (FIG. 5) and the heat sink 20 as well as between the board 30 and the reflector collar 15.
  • Referring now to FIG. 5, an exploded perspective view of the LED downlight 10 is depicted. As previously indicated, the downlight comprises a heat dissipation subassembly 12 having the heat sink 20 and a thermal pad or interface 28. The thermal interface 28 is formed of a thermally conductive material having an upper surface and a lower surface and may be in contact with at least one of the heat sink 20 and the reflector 14. The thermal interface 28 comprises a plurality of apertures 28 a for connecting the interface 28 to a LED printed circuit board assembly 30. The interface 28 compensates for surface irregularities which otherwise might inhibit optimal thermal transfer. The interface 28 also defines a path for heat transfer from the LED printed circuit board assembly 30 to the heat sink 20. Alternatively, if surface irregularities are removed, the thermal interface 28 could also be removed from the assembly. The apertures 28 a allow the fasteners to connect the thermal pad to the LED printed circuit board assembly 30. A subassembly fastening aperture 28 b is also centrally positioned on the thermal pad 28. This allows a fastening connection of a mixing chamber 40 to the heat dissipation subassembly 12. The exemplary thermal interface 28 may be formed of grease, silicone, graphite or any thermally conductive medium. Beneath the thermal pad or inner face 28 is a LED metal core printed circuit board 32. An exemplary model used in the present embodiment may be formed of aluminum metal core board, copper metal core board, or fiberglass reinforced (FR4) board. The printed circuit board 32 is formed of thermal conductive material which moves heat from the LEDs 34 to the heat sink 20 through the interface 28. Also the printed circuit board 32 moves heat through the primary reflector 14 by direct contact between the two parts.
  • Exploded from the LED metal core printed circuit board 32 are a plurality of LEDs 34 and a power connector 36. The LEDs 34 are available from a variety of manufactures and are electrically connected to the printed circuit board 32. The LEDs 34 may emit any color desired for any given lighting application and may be selected by a lighting designer for example. Additionally, the LED printed circuit board assembly 30 comprises 16 LEDs 34 although this number is merely exemplary and therefore should not be considered limiting.
  • Beneath the heat dissipation subassembly 12 and the LED printed circuit board assembly 30 is the primary reflector 14. The retaining ring 60, optical assembly 50 and the mixing chamber 40 are positioned up through the lower opening of the primary reflector 40 against the upper shoulder or collar 15 of the reflector 14. The mixing chamber 40 comprises of a fastener 19 extending from a central location which passes through the opening in the primary reflector 14 and upwardly through the LED printed circuit board assembly 30 and the thermal interface 28 and heat sink 20. The fastener 19 is tightened by the subassembly nut 18 so that the mixing chamber 40 and optical assembly 50 are held in position. According to this embodiment, the upper heat dissipation system are held in place by the four screws and the lower optical system are held in position by the fastener 19.
  • Beneath the primary reflector 14 is a mixing chamber 40. The mixing chamber 40 collects and redirects the light emitted from the various LEDs 34 while also inhibiting visual recognition of any single LED 34. Because each LED may differ slightly in color, the mixing chamber 40 combines the light into a single output color and does so in an efficient manner. The exemplary mixing chamber 40 is a plastic subassembly, although other materials could be used, comprising a reflective material or coating along an inner surface thereof, described further herein. The mixing chamber 40 is generally frusto-conical in shape with an upper surface 42 and a frusto-conical sidewall 44 extending from the top wall 42 down to a lower flange 46. The top wall 42 includes a plurality of apertures which are aligned with the LEDs 34 therein or at least allow light to pass there through. The mixing chamber 40 further comprises a plurality of keying or positioning spacers 48 extending from the sidewall 44 in order to properly position the mixing chamber within the inner surface of the primary reflector 14.
  • Exploded from the mixing chamber 40 is a reflective material 38. The reflective material 38 may be a film, tape or coating positioned on an upper inner surface of the mixing chamber 40 beneath the LED printed circuit board assembly 30. The reflective film 38 has a plurality of apertures through which the LEDs or light output from the LEDs may pass into the mixing chamber 40.
  • Also exploded from the mixing chamber 40 is the reflective inner surface material 41. The reflective material may be a 3M polyester film having a marketing name, “Vikuiti”. The material 41 is positioned along the inner surface of sidewall 44 so as to reflect light from the inner surface of the mixing chamber 40. In an alternative embodiment, the mixing chamber 40 may be formed of metallic material which may be polished so that the reflective film 41 is not utilized. In further embodiments, the mixing chamber 40 may either be painted or have a treated metallic surface so as to reflect light in a desirable manner.
  • Beneath the mixing chamber 40 is an optical assembly 50. The optical assembly 50 moves the light source from the LEDs 34 to an effective light source at the lens 58. Additionally, the optical assembly 50, in combination with the mixing chamber 40, helps to output a single mixed light rather than multiple distinct sources from the multiple LEDs. The optical assembly 50 may include a lens 58, a diffuser, and/or a phosphor system 54 or any combination thereof. The diffuser 52 spreads and controls the light output from the down light 10. The diffuser 52 may be one of glass or a polycarbonate and may be smoothly finished or may have a plurality of prismatic structure, grooved or other light controlling implements. Similarly, the lens 58 may be formed of glass, polycarbonate or other such material. On the upper surface of the diffuser 52 may be a phosphor system 54, which may be used to control lighting color. Alternatively, the LED's 32 may be white LEDs so as to eliminate the need for the phosphor system 54.
  • Beneath the optical assembly 50 is a retaining ring 60. The retaining ring 60 is formed of stamped aluminum and may be anodized to a specular finish. Alternatively, other materials and finishes may be utilized. The retaining ring 60 has a cylindrical shape with a retaining lip 62 therein. The retaining lip 62 provides a seat for the optical assembly 50 to be seated in the retaining ring. The retaining ring 62 also serves a secondary function of reflecting light from the lower surface, downward. This directs a higher amount of light downwardly, beneath the downlight 10 and increases the light output in this area of a light distribution graph, as shown in FIG. 10 and as compared to FIG. 1.
  • Referring now to FIG. 6, a cross-sectional view of the LED downlight is shown in the assembled configuration. The mixing subassembly 40 is positioned in the upper portion of the reflector 14. The retaining ring 60 includes a lip 62 which is disposed at an angle θ to a vertical axis Av. The angle θ measured from the vertical axis Av may be between 35 and 65 degrees. More preferable, the angle θ is within the range of about 40° to 60°, and even more preferably the angle is in the range from about 44° to 51° degrees. The retaining lip 62 provides a position to seat the optical assembly 50 which comprises a glass lens and a diffuser having a phosphor film, according to the exemplary embodiment. The mixing chamber 40 is seated against the upper surface of the optical assembly 50. The optical assembly 50 rests against the retaining lip 62 and therefore the optical assembly 50 is captured between the retaining lip 62 and the lower flange 46 of the mixing chamber 40.
  • The lower surface of the retaining ring 62 also serves as a secondary reflector. Ray traces R are indicated reflecting from the inner surface of lip 62 downwardly which result in higher light distribution beneath the downlight 10. This is indicated graphically in FIG. 10. The reflective surface 62 directs light downwardly to increase illumination beneath the downlight at the center of a measured light distribution pattern. With this downward kick of light through a retaining ring 60 the LED downlight improves illumination in this central portion of a measurable light distribution.
  • FIG. 6 also depicts a fastener 19 extending upwardly through the mixing chamber 40 and through the heat sink 20. A subassembly nut 18 is disposed on the upper side of the heat sink 20 and fastens the mixing chamber 40, reflector 14 and heat dissipating subassembly 12 together. The upper shoulder 15 of the reflector 14 is sandwiched or captured between the heat sink 20, thermal interface 28 and LED printed circuit board assembly 30 on one side and the spacers 48 on the opposite side.
  • Referring now to FIG. 7, a cross-sectional prospective view of the LED downlight is depicted. The section view shows the first heat dissipation subassembly 12 and the second heat dissipation subassembly or reflector 14. The first heat dissipation subassembly 12 the LED printed circuit board assembly 30 is positioned beneath the thermal pad or interface 28. On the opposite side of the thermal pad 28 is the heat sink 20. Thus, heat is transferred from the LED printed circuit board assembly 30 through the thermal interface 28 to the heat sink 20 in one direction. The heat sink 20 is positioned within a plenum area within the ceiling. As heat builds up within this plenum area, it becomes more difficult for the plenum area to dissipate the heat so that the LED downlight 10 can continue to run as efficiently as possible. However, beneath the plenum, the primary reflector 14 is able to conduct thermal energy to the space beneath the downlight which is typically of a cooler temperature than the air in the plenum above the downlight 10. Thus, in order to take advantage of the cooler air in the area beneath the ceiling, the LED downlight transfers thermal energy from the LED printed circuit board assembly 30 to the primary reflector 14. According to the instant embodiment, the metal core printed circuit board 32 is in direct contact with the primary reflector below to transfer energy from the circuit board 32 to the primary reflector 14. Thus, the first heat dissipation mean 12 dissipates heat to the space generally above the LED downlight 10 and the primary reflector or second heat dissipation means 14 conducts thermal energy to the cooler air generally below the LED downlight 10.
  • Referring now to FIG. 8, the retaining ring 60 is depicted in perspective view. The retaining ring 60 is generally cylindrical in shape and has the lip 62 extending upwardly from a lower area of a retaining ring. Accordingly to the exemplary embodiment, the lower retaining lip 62 extends from the lower edge of the retaining ring 60. The sidewall 66 of the retaining ring comprises a plurality of slots 64. The slots receive the outer lower flange 46 (FIG. 5) of the mixing chamber 40. Once the flange 46 is positioned within the slot elements 64, the retaining ring 60 is bent to retain the mixing chamber 40 in place. Specifically, the upper portion of the retaining ring 62 above the slot 64 is bent radially inwardly at various positions so as to retain the mixing chamber 40 in position. However, other means of maintaining the assembly together may be utilized.
  • Referring to FIG. 9, the retaining ring 60 is shown in section view. The retaining lip 62 extends upwardly at an angle θ from the vertical. The slots 64 for retaining the flange 46 of the mixing chamber 40 are also shown.
  • The foregoing description of structures and methods has been presented for purposes of illustration. It is not intended to be exhaustive or to limit the invention to the precise steps and/or forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. It is intended that the scope of the invention be defined by the claims appended hereto.

Claims (21)

1. An LED downlight, comprising:
a primary reflector having an upper end and an open lower end;
an LED printed circuit board assembly disposed in said upper end of said reflector;
an optical assembly positioned beneath said LED printed circuit board assembly;
a secondary reflective ring positioned beneath said LED printed circuit board assembly and within said primary reflector housing, said secondary reflector ring supporting said optical assembly and improving light distribution.
2. The LED downlight of claim 1, said secondary reflector ring having an inner beveled surface.
3. The LED downlight of claim 2, said inner beveled surface directing light downwardly centrally beneath said downlight.
4. The LED downlight of claim 2, said inner beveled surface being at angle of between about 35 and 65 degrees.
5. The LED downlight of claim 1, said LED downlight having a plurality of blue LEDs.
6. The LED downlight of claim 5, said optical assembly having a phosphor system on an inner surface closest to said LED printed circuit board assembly.
7. An LED downlight, comprising:
an LED array disposed on a printed circuit board;
a mixing chamber disposed within a primary reflector, said LED array positioned near an upper end of said primary reflector;
a retaining ring having a reflective inner surface positioned with said primary reflector;
an optical assembly disposed within said retaining ring;
said mixing chamber capturing said optical assembly within said retaining ring;
said retaining ring inner surface being beveled and distributing a light pattern downward and centrally beneath said downlight.
8. The LED downlight of claim 7, said beveled inner surface disposed at an angle of between about 35 and 65 degrees.
9. The LED downlight of claim 7, said beveled inner surface having a length of about 0.1 inches.
10. The LED downlight of claim 7, said beveled inner surface extending from said lens to said primary reflector.
11. The LED downlight of claim 7, said retaining ring having a lip for seating said lens.
12. The LED downlight of claim 7, said LED array having a plurality of white LEDs.
13. The LED downlight of claim 7, said LED array connected to a metal core printed circuit board.
14. The LED downlight of claim 7, said retaining ring formed of aluminum.
15. The LED downlight of claim 7, said retaining ring inner beveled surface being one of specular, diffuse or semi-diffuse.
16. An LED downlight, comprising:
a primary reflector having an upper end and a lower open end;
a LED printed circuit board assembly disposed near said upper end of said primary reflector;
a mixing subassembly depending downwardly toward a lens, said mixing subassembly receiving light from said LED printed circuit board assembly, said lens beneath said LED printed circuit board assembly;
a retaining ring receiving said lens, said retaining ring disposed within said primary reflector;
said retaining ring further comprising an angled inner surface.
17. The LED downlight of claim 16 further comprising a plurality of LED apertures disposed in an upper surface of said mixing subassembly.
18. The LED downlight of claim 16, said mixing subassembly having a reflective inner surface.
19. The LED downlight of claim 16 said mixing assembly being substantially frusto-conical in shape.
20. The LED downlight of claim 16 further comprising a mixing chamber subassembly being seated in said retaining ring.
21. The LED downlight of claim 20, said mixing chamber subassembly fastened to said heat sink.
US12/703,334 2009-02-11 2010-02-10 LED downlight retaining ring Active 2031-10-10 US8602601B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US15177409P true 2009-02-11 2009-02-11
US12/703,334 US8602601B2 (en) 2009-02-11 2010-02-10 LED downlight retaining ring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/703,334 US8602601B2 (en) 2009-02-11 2010-02-10 LED downlight retaining ring

Publications (2)

Publication Number Publication Date
US20100259919A1 true US20100259919A1 (en) 2010-10-14
US8602601B2 US8602601B2 (en) 2013-12-10

Family

ID=42934229

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/703,334 Active 2031-10-10 US8602601B2 (en) 2009-02-11 2010-02-10 LED downlight retaining ring

Country Status (1)

Country Link
US (1) US8602601B2 (en)

Cited By (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080151143A1 (en) * 2006-10-19 2008-06-26 Intematix Corporation Light emitting diode based backlighting for color liquid crystal displays
US20090296414A1 (en) * 2008-05-30 2009-12-03 Toshiba Lighting & Technology Corporation Lighting apparatus and substrate having plurality of light-emitting elements mounted thereon and incorporated in this lighting apparatus
US20100053950A1 (en) * 2008-08-28 2010-03-04 Toshiba Lighting & Technology Corporation Lighting apparatus having light emitting diodes for light source
US20100067226A1 (en) * 2008-09-16 2010-03-18 Toshiba Lighting & Technology Corporation Light source unit and lighting apparatus having light-emitting diodes for light source
US20100128491A1 (en) * 2008-11-25 2010-05-27 Toshiba Lighting & Technology Corporation Recessed luminaire
US20110075427A1 (en) * 2009-09-25 2011-03-31 Toshiba Lighting & Technology Lighting apparatus
US20110074265A1 (en) * 2009-09-25 2011-03-31 Cree Led Lighting Solutions, Inc. Lighting device with one or more removable heat sink elements
WO2011082457A1 (en) * 2010-01-11 2011-07-14 Gerard Lighting Pty Ltd Downlight
US20120002416A1 (en) * 2010-08-11 2012-01-05 Lg Innotek Co., Ltd. Lighting device
WO2012110718A1 (en) * 2011-02-17 2012-08-23 Ld Lighting apparatus with conical optical block
US20120236532A1 (en) * 2011-03-14 2012-09-20 Koo Won-Hoe Led engine for illumination
CN102865531A (en) * 2011-07-06 2013-01-09 陈波 LED (Light-Emitting Diode) illumination down lamp
US20130016505A1 (en) * 2010-04-09 2013-01-17 Tridonic Jennersdorf Gmbh LED Module for Spotlights
WO2013032634A1 (en) * 2011-09-02 2013-03-07 Cree, Inc. Lighting device
WO2013052749A2 (en) * 2011-10-06 2013-04-11 Intematix Corporation Solid-state lamps with improved radial emission and thermal performance
WO2013055764A1 (en) * 2011-10-13 2013-04-18 Intematix Corporation Wavelength conversion component with improved protective characteristics for remote wavelength conversion
WO2013055719A1 (en) * 2011-10-13 2013-04-18 Intematix Corporation Solid-state light emitting devices with multiple remote wavelength conversion components
WO2013030333A3 (en) * 2011-09-02 2013-05-10 Zumtobel Lighting Gmbh Heat sink for downlight, and downlight
CN103292222A (en) * 2013-06-07 2013-09-11 广州奥迪通用照明有限公司 LED wall lamp with more light given out
CN103322476A (en) * 2013-06-28 2013-09-25 扬州天白科技发展有限公司 Led ceiling light
ITBS20120064A1 (en) * 2012-04-13 2013-10-14 Simes Lighting Fixture
EP2455654A3 (en) * 2010-11-18 2013-12-25 Toshiba Lighting & Technology Corporation Embedded-type luminaire
US8616714B2 (en) 2011-10-06 2013-12-31 Intematix Corporation Solid-state lamps with improved radial emission and thermal performance
EP2722582A1 (en) * 2012-10-19 2014-04-23 Toshiba Lighting & Technology Corporation Luminaire
US8746927B1 (en) * 2010-05-07 2014-06-10 Cooper Technologies Company Systems, methods, and devices for providing flexible heat sinks to light modules
US20140226332A1 (en) * 2013-02-04 2014-08-14 Sunlite Science & Technology, Inc. Application-Specific LED module and Associated LED Point Source Luminaires
WO2014143524A1 (en) * 2013-03-14 2014-09-18 Ge Lighting Solutions Llc Optical system for a directional lamp
US8858016B2 (en) 2012-12-06 2014-10-14 Relume Technologies, Inc. LED heat sink apparatus
US8882311B2 (en) * 2012-04-27 2014-11-11 Cree, Inc. Lens assembly for lighting fixture
US20150036362A1 (en) * 2012-01-25 2015-02-05 Koninklijke Philips N.V. LED module and luminaire comprising said module
US8992051B2 (en) 2011-10-06 2015-03-31 Intematix Corporation Solid-state lamps with improved radial emission and thermal performance
US9004722B2 (en) 2012-07-31 2015-04-14 Qualcomm Mems Technologies, Inc. Low-profile LED heat management system
JP2015079770A (en) * 2012-07-04 2015-04-23 ポスコ エルイーディ カンパニー リミテッド Optical semiconductor lighting device
US9052081B1 (en) * 2012-05-04 2015-06-09 Cooper Technologies Company Magnetic downlight wall-wash kicker
US9091426B2 (en) 2012-03-29 2015-07-28 Abl Ip Holding Llc Light assembly
US20150219325A1 (en) * 2014-02-03 2015-08-06 Juno Manufacturing Llc Twist lock optical holder for recessed lighting
TWI495823B (en) * 2012-12-12 2015-08-11 Lattice Energy Technology Corp
TWI499744B (en) * 2012-06-26 2015-09-11 Panasonic Corp Lighting fixture
US20150323162A1 (en) * 2014-05-09 2015-11-12 Dongguan Jiasheng Lighting Technology Co.,Ltd. Light-emitting diode (led) lighting fixture
US20160091175A1 (en) * 2012-04-13 2016-03-31 Lg Innotek Co., Ltd. Lighting device
JP2016181435A (en) * 2015-03-24 2016-10-13 東芝ライテック株式会社 Lighting device
JP2016181436A (en) * 2015-03-24 2016-10-13 東芝ライテック株式会社 Lighting device
US20160320004A1 (en) * 2015-04-30 2016-11-03 Cree, Inc. Solid state lighting components
US20160348861A1 (en) * 2015-05-29 2016-12-01 DMF, Inc. Lighting module for recessed lighting systems
WO2017098487A1 (en) * 2015-12-10 2017-06-15 Aurora Limited Improved downlight
JP2017130472A (en) * 2017-04-28 2017-07-27 岩崎電気株式会社 lamp
US20170292690A1 (en) * 2016-04-06 2017-10-12 General Electric Company Heat dissipating reflectors for led luminaires
KR101799908B1 (en) 2016-08-10 2017-12-20 최호정 Led lighting apparatus
KR101799906B1 (en) 2016-08-10 2017-12-20 최호정 Led lighting apparatus
EP3177867A4 (en) * 2014-08-08 2018-03-14 Transcend Lighting Inc. Electromagnetic wavelength conversion device
US9964266B2 (en) 2013-07-05 2018-05-08 DMF, Inc. Unified driver and light source assembly for recessed lighting
GB2561484A (en) * 2015-12-10 2018-10-17 Aurora Ltd Improved downlights
USD833977S1 (en) 2015-10-05 2018-11-20 DMF, Inc. Electrical junction box
US10139059B2 (en) 2014-02-18 2018-11-27 DMF, Inc. Adjustable compact recessed lighting assembly with hangar bars

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9285103B2 (en) 2009-09-25 2016-03-15 Cree, Inc. Light engines for lighting devices
US8777449B2 (en) * 2009-09-25 2014-07-15 Cree, Inc. Lighting devices comprising solid state light emitters
CN102537719B (en) * 2010-11-18 2015-03-04 东芝照明技术株式会社 Luminaire
US9494293B2 (en) 2010-12-06 2016-11-15 Cree, Inc. Troffer-style optical assembly
US9581312B2 (en) 2010-12-06 2017-02-28 Cree, Inc. LED light fixtures having elongated prismatic lenses
US9423117B2 (en) 2011-12-30 2016-08-23 Cree, Inc. LED fixture with heat pipe
US9599315B1 (en) 2012-01-19 2017-03-21 Cooper Technologies Company Optical attachment features for light-emitting diode-based lighting system
US8845144B1 (en) 2012-01-19 2014-09-30 Cooper Technologies Company Light-emitting diode driver case
US9777897B2 (en) 2012-02-07 2017-10-03 Cree, Inc. Multiple panel troffer-style fixture
US9494294B2 (en) 2012-03-23 2016-11-15 Cree, Inc. Modular indirect troffer
US9874322B2 (en) 2012-04-10 2018-01-23 Cree, Inc. Lensed troffer-style light fixture
US9146031B2 (en) * 2012-04-13 2015-09-29 Bridgelux, Inc. Lighting module
US9291319B2 (en) * 2012-05-07 2016-03-22 Cooper Technologies Company Reflectors and reflector orientation feature to prevent non-qualified trim
JP6041240B2 (en) * 2013-01-22 2016-12-07 パナソニックIpマネジメント株式会社 Illumination light source and a lighting device
USD786471S1 (en) 2013-09-06 2017-05-09 Cree, Inc. Troffer-style light fixture
USD772465S1 (en) 2014-02-02 2016-11-22 Cree Hong Kong Limited Troffer-style fixture
US20150219319A1 (en) * 2014-02-02 2015-08-06 Cree Hong Kong Limited Troffer-style fixture with led strips
USD807556S1 (en) 2014-02-02 2018-01-09 Cree Hong Kong Limited Troffer-style fixture
TW201608171A (en) * 2014-08-22 2016-03-01 Bright Led Electronics Corp Light emitting module
US10012354B2 (en) 2015-06-26 2018-07-03 Cree, Inc. Adjustable retrofit LED troffer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050168986A1 (en) * 2004-01-30 2005-08-04 Scott Wegner Reflector assemblies for luminaires
US20080112170A1 (en) * 2006-11-14 2008-05-15 Led Lighting Fixtures, Inc. Lighting assemblies and components for lighting assemblies
US20080165535A1 (en) * 2007-01-09 2008-07-10 Mazzochette Joseph B Thermally-Managed Led-Based Recessed Down Lights
US8070328B1 (en) * 2009-01-13 2011-12-06 Koninkliljke Philips Electronics N.V. LED downlight
US8142057B2 (en) * 2009-05-19 2012-03-27 Schneider Electric USA, Inc. Recessed LED downlight

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006105346A2 (en) 2005-03-29 2006-10-05 Integrated Lighting Solutions Llc Small form factor downlight system
JP2007035366A (en) 2005-07-25 2007-02-08 Kokubu Denki Co Ltd Illumination device
US7935201B2 (en) 2006-11-29 2011-05-03 Wausau Paper Mills, Llc Non-slip masking product, and methods

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050168986A1 (en) * 2004-01-30 2005-08-04 Scott Wegner Reflector assemblies for luminaires
US20080112170A1 (en) * 2006-11-14 2008-05-15 Led Lighting Fixtures, Inc. Lighting assemblies and components for lighting assemblies
US20080165535A1 (en) * 2007-01-09 2008-07-10 Mazzochette Joseph B Thermally-Managed Led-Based Recessed Down Lights
US8070328B1 (en) * 2009-01-13 2011-12-06 Koninkliljke Philips Electronics N.V. LED downlight
US8142057B2 (en) * 2009-05-19 2012-03-27 Schneider Electric USA, Inc. Recessed LED downlight

Cited By (80)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080151143A1 (en) * 2006-10-19 2008-06-26 Intematix Corporation Light emitting diode based backlighting for color liquid crystal displays
US20090296414A1 (en) * 2008-05-30 2009-12-03 Toshiba Lighting & Technology Corporation Lighting apparatus and substrate having plurality of light-emitting elements mounted thereon and incorporated in this lighting apparatus
US8668355B2 (en) 2008-05-30 2014-03-11 Toshiba Lightning & Technology Corporation Light emitting module having heat conductive substrate
US9279575B2 (en) 2008-05-30 2016-03-08 Kabushiki Kaisha Toshiba Light emitting module having heat conductive substrate
US9303855B2 (en) 2008-05-30 2016-04-05 Toshiba Lighting & Technology Corporation Light emitting module having heat conductive substrate
US9410685B2 (en) 2008-05-30 2016-08-09 Toshiba Lighting & Technology Corporation Light emitting module having heat conductive substrate
US8545051B2 (en) 2008-05-30 2013-10-01 Toshiba Lighting & Technology Corporation Lighting apparatus with heat conductive substrate
US8556460B2 (en) 2008-05-30 2013-10-15 Toshiba Lighting & Technology Corporation Lighting apparatus and light-emitting element mounting substrate having stress absorbing means
US20100053950A1 (en) * 2008-08-28 2010-03-04 Toshiba Lighting & Technology Corporation Lighting apparatus having light emitting diodes for light source
US8128263B2 (en) 2008-09-16 2012-03-06 Toshiba Lighting & Technology Corporation Light source unit and lighting apparatus having light-emitting diodes for light source
US20100067226A1 (en) * 2008-09-16 2010-03-18 Toshiba Lighting & Technology Corporation Light source unit and lighting apparatus having light-emitting diodes for light source
US20100128491A1 (en) * 2008-11-25 2010-05-27 Toshiba Lighting & Technology Corporation Recessed luminaire
US8491163B2 (en) 2009-09-25 2013-07-23 Toshiba Lighting & Technology Corporation Lighting apparatus
US20110074265A1 (en) * 2009-09-25 2011-03-31 Cree Led Lighting Solutions, Inc. Lighting device with one or more removable heat sink elements
US20110075427A1 (en) * 2009-09-25 2011-03-31 Toshiba Lighting & Technology Lighting apparatus
US9464801B2 (en) * 2009-09-25 2016-10-11 Cree, Inc. Lighting device with one or more removable heat sink elements
WO2011082457A1 (en) * 2010-01-11 2011-07-14 Gerard Lighting Pty Ltd Downlight
US8960952B2 (en) * 2010-04-09 2015-02-24 Tridonic Jennersdorf Gmbh LED module for spotlights
US20130016505A1 (en) * 2010-04-09 2013-01-17 Tridonic Jennersdorf Gmbh LED Module for Spotlights
US8746927B1 (en) * 2010-05-07 2014-06-10 Cooper Technologies Company Systems, methods, and devices for providing flexible heat sinks to light modules
US8308319B2 (en) * 2010-08-11 2012-11-13 Lg Innotek Co., Ltd. Lighting device
US20120002416A1 (en) * 2010-08-11 2012-01-05 Lg Innotek Co., Ltd. Lighting device
US8939612B2 (en) 2010-11-18 2015-01-27 Toshiba Lighting & Technology Corporation Luminaire having a socket, a radiating member and a reflecting member fixed therebetween
EP2455654A3 (en) * 2010-11-18 2013-12-25 Toshiba Lighting & Technology Corporation Embedded-type luminaire
FR2971832A1 (en) * 2011-02-17 2012-08-24 Ld An apparatus for lighting a conical optical block
WO2012110718A1 (en) * 2011-02-17 2012-08-23 Ld Lighting apparatus with conical optical block
US20120236532A1 (en) * 2011-03-14 2012-09-20 Koo Won-Hoe Led engine for illumination
CN102865531A (en) * 2011-07-06 2013-01-09 陈波 LED (Light-Emitting Diode) illumination down lamp
US8803414B2 (en) 2011-09-02 2014-08-12 Cree, Inc. Lighting device
CN103874876A (en) * 2011-09-02 2014-06-18 科锐公司 Lighting device
WO2013030333A3 (en) * 2011-09-02 2013-05-10 Zumtobel Lighting Gmbh Heat sink for downlight, and downlight
WO2013032634A1 (en) * 2011-09-02 2013-03-07 Cree, Inc. Lighting device
WO2013052749A3 (en) * 2011-10-06 2013-06-20 Intematix Corporation Solid-state lamps with improved radial emission and thermal performance
US8616714B2 (en) 2011-10-06 2013-12-31 Intematix Corporation Solid-state lamps with improved radial emission and thermal performance
WO2013052749A2 (en) * 2011-10-06 2013-04-11 Intematix Corporation Solid-state lamps with improved radial emission and thermal performance
US8992051B2 (en) 2011-10-06 2015-03-31 Intematix Corporation Solid-state lamps with improved radial emission and thermal performance
US9115868B2 (en) 2011-10-13 2015-08-25 Intematix Corporation Wavelength conversion component with improved protective characteristics for remote wavelength conversion
WO2013055764A1 (en) * 2011-10-13 2013-04-18 Intematix Corporation Wavelength conversion component with improved protective characteristics for remote wavelength conversion
WO2013055719A1 (en) * 2011-10-13 2013-04-18 Intematix Corporation Solid-state light emitting devices with multiple remote wavelength conversion components
US9989235B2 (en) * 2012-01-25 2018-06-05 Philips Lighting Holding B.V. LED module and luminaire comprising said module
US20150036362A1 (en) * 2012-01-25 2015-02-05 Koninklijke Philips N.V. LED module and luminaire comprising said module
US9091426B2 (en) 2012-03-29 2015-07-28 Abl Ip Holding Llc Light assembly
US9927074B2 (en) * 2012-04-13 2018-03-27 Lg Innotek Co., Ltd. Lighting device
ITBS20120064A1 (en) * 2012-04-13 2013-10-14 Simes Lighting Fixture
US20160091175A1 (en) * 2012-04-13 2016-03-31 Lg Innotek Co., Ltd. Lighting device
US8882311B2 (en) * 2012-04-27 2014-11-11 Cree, Inc. Lens assembly for lighting fixture
US9052081B1 (en) * 2012-05-04 2015-06-09 Cooper Technologies Company Magnetic downlight wall-wash kicker
TWI499744B (en) * 2012-06-26 2015-09-11 Panasonic Corp Lighting fixture
JP2015079770A (en) * 2012-07-04 2015-04-23 ポスコ エルイーディ カンパニー リミテッド Optical semiconductor lighting device
US9004722B2 (en) 2012-07-31 2015-04-14 Qualcomm Mems Technologies, Inc. Low-profile LED heat management system
EP2722582A1 (en) * 2012-10-19 2014-04-23 Toshiba Lighting & Technology Corporation Luminaire
US8770798B2 (en) 2012-10-19 2014-07-08 Toshiba Lighting & Technology Corporation Luminaire
US8858016B2 (en) 2012-12-06 2014-10-14 Relume Technologies, Inc. LED heat sink apparatus
TWI495823B (en) * 2012-12-12 2015-08-11 Lattice Energy Technology Corp
US9644830B2 (en) * 2013-02-04 2017-05-09 Sunlite Science & Technology, Inc. Application-specific LED module and associated LED point source luminaires
US20140226332A1 (en) * 2013-02-04 2014-08-14 Sunlite Science & Technology, Inc. Application-Specific LED module and Associated LED Point Source Luminaires
WO2014143524A1 (en) * 2013-03-14 2014-09-18 Ge Lighting Solutions Llc Optical system for a directional lamp
US9188312B2 (en) 2013-03-14 2015-11-17 GE Lighting Solutions, LLC Optical system for a directional lamp
CN103292222A (en) * 2013-06-07 2013-09-11 广州奥迪通用照明有限公司 LED wall lamp with more light given out
CN103292222B (en) * 2013-06-07 2016-01-13 广州奥迪通用照明有限公司 A multi-light led lamp
CN103322476A (en) * 2013-06-28 2013-09-25 扬州天白科技发展有限公司 Led ceiling light
US9964266B2 (en) 2013-07-05 2018-05-08 DMF, Inc. Unified driver and light source assembly for recessed lighting
US9581318B2 (en) * 2014-02-03 2017-02-28 Abl Ip Holding Llc Twist lock optical holder for recessed lighting
US20150219325A1 (en) * 2014-02-03 2015-08-06 Juno Manufacturing Llc Twist lock optical holder for recessed lighting
US10139059B2 (en) 2014-02-18 2018-11-27 DMF, Inc. Adjustable compact recessed lighting assembly with hangar bars
US20150323162A1 (en) * 2014-05-09 2015-11-12 Dongguan Jiasheng Lighting Technology Co.,Ltd. Light-emitting diode (led) lighting fixture
US9541264B2 (en) * 2014-05-09 2017-01-10 Dongguan Jiasheng Lighting Technology Co., Ltd. Light-emitting diode (LED) lighting fixture
EP3177867A4 (en) * 2014-08-08 2018-03-14 Transcend Lighting Inc. Electromagnetic wavelength conversion device
JP2016181435A (en) * 2015-03-24 2016-10-13 東芝ライテック株式会社 Lighting device
JP2016181436A (en) * 2015-03-24 2016-10-13 東芝ライテック株式会社 Lighting device
US20160320004A1 (en) * 2015-04-30 2016-11-03 Cree, Inc. Solid state lighting components
US20160348861A1 (en) * 2015-05-29 2016-12-01 DMF, Inc. Lighting module for recessed lighting systems
USD833977S1 (en) 2015-10-05 2018-11-20 DMF, Inc. Electrical junction box
GB2545242B (en) * 2015-12-10 2018-08-01 Aurora Ltd Improved downlight
GB2561484A (en) * 2015-12-10 2018-10-17 Aurora Ltd Improved downlights
WO2017098487A1 (en) * 2015-12-10 2017-06-15 Aurora Limited Improved downlight
US20170292690A1 (en) * 2016-04-06 2017-10-12 General Electric Company Heat dissipating reflectors for led luminaires
KR101799908B1 (en) 2016-08-10 2017-12-20 최호정 Led lighting apparatus
KR101799906B1 (en) 2016-08-10 2017-12-20 최호정 Led lighting apparatus
JP2017130472A (en) * 2017-04-28 2017-07-27 岩崎電気株式会社 lamp

Also Published As

Publication number Publication date
US8602601B2 (en) 2013-12-10

Similar Documents

Publication Publication Date Title
US8322896B2 (en) Solid-state light bulb
US7866850B2 (en) Light fixture assembly and LED assembly
US7985005B2 (en) Lighting assembly and light module for same
US8152336B2 (en) Removable LED light module for use in a light fixture assembly
US20080278952A1 (en) Light fixtures and lighting devices
US8403541B1 (en) LED lighting luminaire having replaceable operating components and improved heat dissipation features
US7670021B2 (en) Method and apparatus for thermally effective trim for light fixture
US6502952B1 (en) Light emitting diode assembly for flashlights
US20110080742A1 (en) Light emitting diode (led) based lamp
US20110273900A1 (en) Optical element and light source comprising the same
US20100038657A1 (en) Lighting apparatus
US20120026740A1 (en) Lighting apparatus
US7611264B1 (en) LED lamp
US20100264800A1 (en) Led lamp
US6979107B1 (en) Puck lighting fixture
US20120140461A1 (en) Troffer-style optical assembly
US20120051041A1 (en) Troffer-Style Fixture
US20130120963A1 (en) Low profile light having concave reflector and associated methods
US9052075B2 (en) Standardized troffer fixture
US20100110699A1 (en) Method and Apparatus for Thermally Effective Removable Trim for Light Fixture
US20140347885A1 (en) Optical Waveguide Bodies and Luminaires Utilizing Same
US8070328B1 (en) LED downlight
US20130208457A1 (en) Troffer-style lighting fixture with specular reflector
US7993034B2 (en) Reflector having inflection point and LED fixture including such reflector
US20130033872A1 (en) Lighting fixture

Legal Events

Date Code Title Description
AS Assignment

Owner name: KONINKLIJKE PHILIPS ELECTRONICS N.V., NETHERLANDS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KHAZI, MOHAMED ASLAM;CZECH, KENNETH;FRANCK, PETER;AND OTHERS;SIGNING DATES FROM 20100622 TO 20100624;REEL/FRAME:024594/0072

AS Assignment

Owner name: PHILIPS LIGHTING HOLDING B.V., NETHERLANDS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KONINKLIJKE PHILIPS N.V.;REEL/FRAME:040060/0009

Effective date: 20160607

FPAY Fee payment

Year of fee payment: 4